Lots of wasted colors, like AdamPlays said. If it doesn't make any difference at 1x, that's a sure sign that you're wasting colors.
I also thought some of the cubes looked like they were floating, and imo this is because the shadows you placed aren't sufficient. Since the light is coming from somewhere in the upper left, shadows should be projected to the lower right. This will help the eyes establish where the cubes are with respect to each other.
I like the idea, but uit looks like he's whistling or singing instead of listening to music. Maybe a radio or some headphones?
I'm confused as to why you put three colors on each face of the cubes. It looks like one color even zoomed in x2. Also, the double outline on the bottom of each cube implies they are resting on a surface, yet they all seem to be suspended in air. I do like the idea though. Maybe more if the cube had headphones or something.
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